* server/CorePropertyManager.cpp: Get rid of a warning about a missing
return value.
* tests/AtlasFileLoadertest.cpp: Fix a warning about comparing signed
and unsigned integers.
* tests/EntityExerciser.h: Fill out the functionality to include tests
for the virtual functions that convert an entity into Atlas data.
* tests/BaseEntitytest.cpp: Use the extended EntityExerciser, and
cover all the non-virtual functions in BaseEntity.
* tests/AtlasFileLoadertest.cpp: Add a test for the file loader
class.
